Tadpole ID

[vanilladotexe]

Hello everyone, this is my first post in this forum. I have tadpoles in my fountain and I'd like to know more about how to care for them and make sure as many make it to adulthood as possible to fight the good fight against the evil mosquitoes! I will post pics in hopes of ID. They seem to be ok eating prepared foods, I gave them some Hikari Micro Pellets and it looks like they were eating them. The fountain is pretty small and there's a lot of them in there, so should I be doing water changes to keep the water quality up? Thank you for your time.

Pics:






Also:
Larger tadpoles that are in my pond (not sure if they're the same species, they are easily 10x the size of the wee ones):

[John]

The first few photos look like some kind of Hylid. Not sure about the last photo I'm afraid.

[vanilladotexe]

The first few photos look like some kind of Hylid. Not sure about the last photo I'm afraid.

Thank you, we've been thinking they might be tree frogs, especially since those are the ones we've been hearing at night.